Improvement in the construction of steam-vessels



UNITED STATES PATENT CFFICE.

THOMAS TINANS AND 'VIIILLIAM LOUIS VINANS, OF BALTIMORE, MD.

IMPROVEMENT IN THE CONSTRUCTION OF STEAM-VESSELS.

Specification forming partot' Letters Patent No. 144,243, dated November 4, 1873 application iilcd September 15, 1873.

To all whom it may concor-n:

Be it known that we, THoMAs WINANs, of Baltimore, in the State of Maryland, and VVIL- LmM LoUIs WINANs, of the same place, but at present residing at Brighton, inthe county of Sussex, England, have invented a certain Improvement inthe Hulls of Steam-Vessels, of which the following is a specification:

Our invention consists in certain improve ments upon an invention for which Letters Patent of the United States of America were granted to Ross Winans andthe said Thomas Winans, dated October 26, 1858, for anew and useful improvement in the form of the hulls of steam-vessels.77

The present invention relates to a form of construction Vwhich we employT for the `purpose of reducing the draft of water of spindleshaped steam-vessels, such as are described and shown in the specification of Ross and Thomas Vinans7 patent above referred to.

lVhen constructing our improved vessels according to our present invention, we make them with fiat or nearly fiat bottoms, such as would result from cutting off a segment'from the lowest submerged portion of a true spindleshaped hull. The form will be more or less flattened, according to the circumstances of cach case, such as the size of the ship, or the purpose for which it is intended, without, however, going so far as to affect materially the principles involved in the true spindle form.

In the accompanying drawings, Figure 1 is a diagram representing the outline of a longitudinal vertical section taken in the line of the axis of the vessel; and Fig. 2 is the outline ofl a transverse vertical section, through the line A B of Fig. l, of one of the forms of hull patented by Ross and Thomas `linans, as aforesaid, with our present invention of a iiat bottom adapted thereto. The dotted lines a a a a in both figures represent the outline of the lower portion of a spindle-shaped hull, when constructed according to the invention of Ross and Thomas IVinans, above referred to. The chord subtended between the letters C D, Fig. l, and E F, Fig. 2, represents a iiat bottom applied to the spindle-shaped hull, in accord ance with our present improvements. Similar adaptations of a iiat or nearly flat bottom o may also be applied, when required, to the various other forms of spindle hulls described inthe aforesaid patent of Boss and Thomas lVinau-s.

From the above description, it .is obvious that the present improvement upon Ross and Thomas Winans original invention, which required that all the transverse sections of the hull should be true circles, affords a great advantage over the original invention, in all cases Where large displacement or capacity with limited draft of water is necessary or desirable.

Without materially impairing any of the essential properties peculiar to the spindle form, the advantage would be gained of being able to use very much larger spindle vessels in water of equal depth than would be possible with the true spindle shaped vessels constructed under the patent of Ross Winans and Thomas Winans, aforesaid.

In constructing the hulls `of spindle-shaped vessels according to our present invention, the framing, which may be of any description used in ship-building, is to be bent or molded to the proper shape, and the corners formed by the intersections of the chord with the arc may be slightly rounded 5 and, although we have shown the bottom as perfectly flat, it will be evident that the cut-off portion may be slightly curved without departing from our invention, which has for its object the reduction of the draft of water of spindle-shaped steamvessels. Y .y

Having now described our invention, we wish it to be understood that what we claim as our invention, and desire to secure by Letters Patent, is

A steam-vessel constructed substantially on the plan patented by Ross and Thomas Winans, October 26, A. I). 1858, No. 21,917, and having a flat bottom, as herein described7 so as to reduce the draft thereof, as set forth.

THOMAS VINANS. AYVILLIAM LOUIS IVIN AN S.

2 'Waterloo Place, Pa?? Mali?, Lonfjlon. i 

